CVE-2025-56082 is an OS Command Injection vulnerability identified in the Ruijie RG-BCR RG-BCR600W device, specifically within the Lua controller script located at /usr/lib/lua/luci/controller/admin/common.lua. The vulnerability arises from improper input validation in the check_changes function, which processes POST requests. An attacker with low privileges (PR:L) can craft a malicious POST request that injects arbitrary OS commands, which the system executes with the privileges of the affected process. The vulnerability has a CVSS v3.1 base score of 8.8, indicating high severity, with attack vector network (AV:N), low attack complexity (AC:L), requiring privileges (PR:L), no user interaction (UI:N), unchanged scope (S:U), and high impact on confidentiality, integrity, and availability (C:H/I:H/A:H). This means the attacker must have some level of authenticated access but can then fully compromise the device remotely without user interaction. The lack of published patches or known exploits suggests this is a newly disclosed vulnerability. The affected device, Ruijie RG-BCR600W, is a wireless controller used in enterprise and possibly critical infrastructure environments. Exploitation could allow attackers to execute arbitrary commands, potentially leading to device takeover, network pivoting, data exfiltration, or denial of service. The CWE-78 classification confirms this is a classic OS command injection flaw caused by insufficient sanitization of user-supplied input.

For European organizations, this vulnerability poses a significant risk, especially for those deploying Ruijie RG-BCR600W devices in their network infrastructure. Successful exploitation could lead to complete device compromise, allowing attackers to manipulate network traffic, disrupt wireless services, or use the device as a foothold for lateral movement within the network. This could impact confidentiality by exposing sensitive data, integrity by altering configurations or data, and availability by causing service outages. Critical sectors such as telecommunications, government, finance, and manufacturing that rely on these devices for network management are particularly vulnerable. The requirement for low-level privileges means insider threats or compromised credentials could be leveraged easily. The absence of patches increases the window of exposure, and the lack of known exploits may lead to underestimation of risk, potentially delaying mitigation efforts.

1. Immediately restrict access to the management interfaces of Ruijie RG-BCR600W devices to trusted networks and administrators only, using network segmentation and firewall rules. 2. Implement strong authentication mechanisms and regularly audit credentials to reduce the risk of privilege abuse. 3. Monitor network traffic and device logs for unusual POST requests targeting the check_changes endpoint or other suspicious activities indicative of command injection attempts. 4. Employ intrusion detection/prevention systems (IDS/IPS) with signatures or heuristics capable of detecting command injection patterns. 5. Engage with Ruijie Networks for official patches or firmware updates addressing CVE-2025-56082 and apply them promptly once available. 6. Consider deploying application-layer firewalls or web application firewalls (WAFs) that can filter malicious payloads in HTTP POST requests. 7. Conduct regular security assessments and penetration tests focusing on network management devices to identify and remediate similar vulnerabilities proactively.